Andrea M, Guerrier Y
Clin Otolaryngol Allied Sci. 1981 Aug;6(4):259-64. doi: 10.1111/j.1365-2273.1981.tb01545.x.
This study is based on a very large series of histological sections of non-tumour-bearing larynges, most of them in the horizontal plane. Six hundred sections in one larynx were performed to show the constitution of the anterior region of the larynx at all levels. Although the same tissues are present (fibres, glands and vessels) in almost the entire extent of the anterior segment of the larynx, there is a small zone immediately above the vocal cords with neither glands nor vessels. The authors designate this zone as 'plane O' which separates the anterior commissure from the thyro-epiglottic ligament. It is not possible to separate the anterior commissure from the most anterior portion of the subglottis, because the glands and vessels are in continuity. There are 2 regions of the anterior part of the larynx: a supraglottic (vestibulo-epiglottic) and a glottic-subglottic to which the anterior commissure belongs.
本研究基于大量非肿瘤性喉部的组织学切片，其中大部分为水平面切片。对一个喉部进行了600个切片，以显示喉部各水平前部区域的结构。尽管在喉部前段几乎整个范围内都存在相同的组织（纤维、腺体和血管），但在声带上方紧邻处有一个既无腺体也无血管的小区域。作者将该区域称为“O平面”，它将前联合与甲状会厌韧带分开。由于腺体和血管是连续的，因此无法将前联合与声门下最前部区分开。喉部前部有2个区域：声门上区（前庭会厌区）和声门-声门下区，前联合属于后者。
